Alert archive / Virginia / Winter Storm Warnings in 2017
Winter Storm Warning 3, NWS Baltimore/Washington
NWS Baltimore/Washington issued this winter storm warning at Mar 12, 2017, 2:58 PM EDT for 27 counties in Virginia; 9 counties in Maryland; 8 counties in West Virginia. It took effect at Mar 13, 2017, 7:00 PM EDT. It was in force for 19 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 12, 2017, 2:58 PM EDT (18:58 UTC)
- In effect from
- Mar 13, 2017, 7:00 PM EDT
- Expired
- Mar 14, 2017, 2:05 PM EDT
- In force
- 19 hr
- Issued by
- NWS Baltimore/Washington
All 44 counties
Allegany County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Washington County, MD, Albemarle County, VA, Amherst County, VA, Arlington County, VA, Augusta County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, Highland County, VA, Loudoun County, VA, Madison County, VA, Nelson County, VA, Page County, VA, Rappahannock County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV
The radar
The Sterling radar (KLWX), 58 km from the middle of the area, began a volume at 19:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.0 hours before the alert went out and 65 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1574 m above ground
- 0-6 km bulk shear
- 88 kt
- 0-1 km storm-relative helicity
- -128 m²/s²
- 0-3 km storm-relative helicity
- -31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 7:52 PM EST | Winter Storm Watch | LWX | Albemarle, Amherst, Arlington, Augusta, Clarke, Culpeper and 24 more | 31 hr |
| Mar 12, 1:27 AM EST | Small Craft Advisory | LWX | 4 hr | |
| Mar 12, 1:27 AM EST | Small Craft Advisory | LWX | 19 hr | |
| Mar 12, 1:13 PM EDT | Small Craft Advisory | LWX | 43 hr | |
| Mar 12, 5:11 PM EDT | Gale Warning | LWX | 3 days |
Nearby
Winter Storm Warnings in Virginia, 2017Winter Storm Warnings in Maryland, 2017Winter Storm Warnings in West Virginia, 2017Every winter storm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.